diff --git a/src/renderer/src/windows/mini/home/HomeWindow.tsx b/src/renderer/src/windows/mini/home/HomeWindow.tsx
index 9d9b90520b..e2082d7b93 100644
--- a/src/renderer/src/windows/mini/home/HomeWindow.tsx
+++ b/src/renderer/src/windows/mini/home/HomeWindow.tsx
@@ -19,6 +19,7 @@ import { abortCompletion } from '@renderer/utils/abortController'
 import { isAbortError } from '@renderer/utils/error'
 import { createMainTextBlock, createThinkingBlock } from '@renderer/utils/messageUtils/create'
 import { getMainTextContent } from '@renderer/utils/messageUtils/find'
+import { replacePromptVariables } from '@renderer/utils/prompt'
 import { defaultLanguage } from '@shared/config/constant'
 import { IpcChannel } from '@shared/IpcChannel'
 import { Divider } from 'antd'
@@ -266,6 +267,10 @@ const HomeWindow: FC<{ draggable?: boolean }> = ({ draggable = true }) => {
         newAssistant.webSearchProviderId = undefined
         newAssistant.mcpServers = undefined
         newAssistant.knowledge_bases = undefined
+        // replace prompt vars
+        newAssistant.prompt = await replacePromptVariables(currentAssistant.prompt, currentAssistant?.model.name)
+        // logger.debug('newAssistant', newAssistant)
+
         const { modelMessages, uiMessages } = await ConversationService.prepareMessagesForModel(
           messagesForContext,
           newAssistant